- 1
To undo something that has been or tied to something else, especially when one thing was being pulled by the other. You unhitch a trailer from a car, a caravan from a van, a horse from a cart, a boat from a post. The key idea is not just 'untie' — it is 'separate the thing that was being towed or held'. That is why the word smells of farms, horses, camping trips and country roads. In city life you will meet it mostly around trailers and boats. 'Hitch' as a verb means to with a rope, hook or metal joint; the hitch on the back of a car is the metal ball a trailer sits on. So unhitch simply reverses that. It is an ordinary, everyday verb, not formal, and it is nearly always used with a physical object. Writers sometimes stretch it: 'she unhitched herself from the group', meaning she quietly separated from people she had been travelling with. This is not common, but it is understood, and it keeps the same picture — you were joined and being pulled along; now you are not.
解開、鬆開（尤指把拖車、馬車等跟牽引的東西分開）
原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
unhitchverb
- 1
To disconnect; to detach; to undo that which is hitched.
- There is no knowing what further mischief she might have done, had not York promptly sat himself down flat on her head, to prevent her struggling, at the same time calling out, "Unbuckle the black horse! run for the winch and unscrew the carriage pole; cut the trace here—somebody, if you can't unhitch it."
- Yet had the whole train and all its bombs gone, had the engine crew merely jumped from the train and run as simple self-preservation would have suggested, or unhitched just the engine to make their escape faster, the whole town would have gone and most of the people with it, leaving just a smoking wasteland. Hundreds would have died.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。